Prep Time 15 minutes mins
Cook Time 18 minutes mins
Resting Time 30 minutes mins
Total Time 1 hour hr 3 minutes mins
For best flavor, use freshly brewed strong coffee and allow it to cool fully before adding to the batter or frosting so it does not melt the butter or thin the mixture. Do not overmix the batter once the dry ingredients are added, as this can make the cupcakes dense instead of tender. If you prefer a milder coffee taste, reduce or omit the instant espresso powder; for a stronger kick, increase it slightly or use espresso instead of regular coffee. Adjust frosting consistency by adding a teaspoon of milk or powdered sugar at a time if needed, and always ensure the cupcakes are completely cool before frosting to prevent sliding or melting.